| Jul 18, 2026 | Panda | 1–0 | Niemi | Round 9: Panda, Barnabas - Niemi, Kalle | King's Indian Defense: Karpov System | |
| Jul 17, 2026 | Niemi | ½–½ | Zhang | Round 8: Niemi, Kalle - Zhang, Yiming | Sicilian Defense: Najdorf Variation | |
| Jul 16, 2026 | Niemi | 1–0 | Tumanov | Round 7: Niemi, Kalle - Tumanov, Dmitri | French Defense: Advance Variation, Milner-Barry Gambit | |
| Jul 16, 2026 | Harikrishnan.A.Ra | 1–0 | Niemi | Round 6: Harikrishnan.A.Ra - Niemi, Kalle | King's Indian Attack: Symmetrical Defense | |
| Jul 15, 2026 | Elgar | 0–1 | Niemi | Round 5: Elgar, Tim - Niemi, Kalle | King's Indian Attack: Symmetrical Defense | |
| Jul 14, 2026 | Niemi | 0–1 | Korneev | Round 4: Niemi, Kalle - Korneev, Oleg | Sicilian Defense: Classical Variation | |
| Jul 14, 2026 | Vorobyov | 0–1 | Niemi | Round 3: Vorobyov, Radmir - Niemi, Kalle | Four Knights Game: Spanish Variation | |
| Jul 14, 2026 | Niemi | 1–0 | Salmelin | Round 2: Niemi, Kalle - Salmelin, Aaro | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jul 14, 2026 | Eriksson | 0–1 | Niemi | Round 1: Eriksson, Urban - Niemi, Kalle | Italian Game: Evans Gambit, Slow Variation | |
| Jul 20, 2025 | Niemi | 0–1 | Ponnio | Round 9: Niemi, Kalle - Ponnio, Toni | Sicilian Defense: Classical Variation | |
| Jul 18, 2025 | Hietanen | ½–½ | Niemi | Round 8: Hietanen, Herman - Niemi, Kalle | Trompowsky Attack | |
| Jul 18, 2025 | Kulaots | 1–0 | Niemi | Round 7: Kulaots, Kaido - Niemi, Kalle | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Jul 17, 2025 | Niemi | ½–½ | Agopov | Round 6: Niemi, Kalle - Agopov, Mikael | Sicilian Defense: Najdorf Variation | |
| Jul 17, 2025 | Niemi | 1–0 | Mashhadi Aghajan | Round 5: Niemi, Kalle - Mashhadi Aghajan, Rayan | Ruy Lopez: Morphy Defense | |
| Jul 15, 2025 | Keinanen | 1–0 | Niemi | Round 4: Keinanen, Toivo - Niemi, Kalle | King's Indian Defense: Semi-Averbakh System | |
| Jul 15, 2025 | Niemi | 1–0 | Galperin | Round 3: Niemi, Kalle - Galperin, Platon | Sicilian Defense: Taimanov Variation | |
| Jul 14, 2025 | Olde | 0–1 | Niemi | Round 2: Olde, Grete - Niemi, Kalle | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Jul 14, 2025 | Niemi | 1–0 | Collander | Round 1: Niemi, Kalle - Collander, Joel | Caro-Kann Defense: Advance Variation, Tal Variation | |